Prevention of left ventricular mural thrombus

Area of Science:

• Cardiology
• Thrombosis Research

Background:

• Acute myocardial infarction frequently leads to left ventricular mural thrombosis.
• Left ventricular mural thrombosis is a primary cause of systemic emboli.

Purpose of the Study:

• To evaluate the efficacy of a high-dose heparin regimen in preventing left ventricular mural thrombosis in patients with anterior transmural myocardial infarction.

Main Methods:

• A double-blind trial compared high-dose (12,500 U every 12 hours) versus low-dose (5,000 U every 12 hours) calcium heparin for 10 days.
• Left ventricular mural thrombosis was assessed using 2-dimensional echocardiography on day 10 post-infarction.

Main Results:

• The high-dose heparin group demonstrated a significantly lower incidence of left ventricular mural thrombosis.
• Therapeutic plasma heparin concentrations (0.2 U/ml) and activated partial thromboplastin time (50-60 seconds) were maintained with the high-dose regimen.
• No increase in bleeding complications was observed in the high-dose group.

Conclusions:

• High-dose subcutaneous heparin is effective in preventing left ventricular mural thrombosis post-myocardial infarction.
• This therapeutic approach offers a favorable safety profile regarding bleeding risk.